JP2932411B2 - Lump removal device for powdery and granular materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing lumps of a granular material.

[0002]

2. Description of the Related Art In a process of transporting a powdery raw material such as powdered iron ore and limestone powder (hereinafter collectively referred to as powdered raw material) at a steel mill or the like by a belt conveyor, the powdered raw material has a shape different from that of the powdered raw material. Large lumps or scrap iron (hereinafter collectively referred to as lumps) are often mixed.

[0003] The lump mixed into the powder raw material is caught in the chute portion of the transfer portion of the belt conveyor and clogged in the cutout gate portion when cutting the belt or cutting out the powder raw material from the hopper at the destination, and cutting is not possible. There was a problem of becoming stable. In particular, when the lump is clogged at the cut-out gate of the drum feeder in the insertion portion of the sintering machine, since the compounding material is not cut out from the clogged portion, a groove is formed on the pallet where the compounding material is inserted. I will. As a result, sintering in the width direction of the pallet becomes unstable, resulting in a decrease in the sintering yield and quality of the sinter.

Therefore, in the step of transporting the powdery raw material,
There is a demand for an apparatus capable of reliably and stably removing lumps in a powder raw material. As one such apparatus, a lump removing apparatus shown in FIG. 6 is generally used. At the tip of the belt conveyor 1, a fixed mass collecting bar 2A is installed, and the conveyed mass 3 is taken out by this.
This is a device for discharging the lump 3 out of the system via the lump collecting chute 8 (see Japanese Utility Model Laid-Open No. 59-176828).

[0005]

By the way, in this device, the lump collecting bar 2A is fixed and installed.
Frequently, the raw material adheres to the periphery of the lump collecting bar 2A, or the lump 3 is clogged in the gap between the lump collecting bars 2A, and the gap of the lump collecting bar 2A is immediately closed. In some cases, the leading end of the conveyor 1 becomes full of the transported powdery raw material, making transport impossible.

[0006] Therefore, it is necessary for the operator to frequently perform inspection and cleaning, and it is difficult to apply the method to a place where constant transportation is required. Also, in order to solve the problem of clogging of the gap between the lump bars 2A by the powdery raw material, the gap between the lump bars 2A is necessarily made large, and as a result, the function of removing lump originally desired can be achieved. It was difficult to satisfy.

SUMMARY OF THE INVENTION The present invention has been made to advantageously solve the above-mentioned problems of the prior art. In the step of transporting powdered raw materials such as powdered iron ore, limestone powder, etc., the present invention Stable removal of lumps in the powdered raw material by reliably removing the raw material from adhering to the lumping bar installed to remove the lumps and blocking the lumping bar caused by clogging due to the clogging of the lumps The purpose is to do.

[0008]

SUMMARY OF THE INVENTION The gist of the present invention is to fix one end to a rotatable shaft and open the other end to a transfer section of a belt conveyor for transporting powdery and granular materials such as iron ore and limestone. And a second shaft is rotatably installed in parallel with and near the axis, and the second axis is provided on the second axis. An apparatus for removing lumps of a granular material, comprising a plurality of wiping bars capable of passing between teeth of the lumping bar.

[0009]

1 and 2 are a cross-sectional view and a plan view of a main part of the present invention, as viewed from the side. In the present invention,
The lump 3 contained in the powder raw material 11 transported by the belt conveyor 1 is received by the lump collecting bar 2 installed at the tip of the belt conveyor 1. At that time, the transported powder raw material 11 passes through the lump bar 2 and is discharged to the next belt conveyor.

Next, after a certain amount of time has passed and the mass 3 has accumulated in the mass collection bar 2, the mass collection bar 2 is moved upward (in the direction of the arrow) by the mass cylinder bar driving rotary cylinder 5.
And stop when it reaches the top (indicated by the dotted line).

Subsequently, the lump 3 clogged in the lump collecting bar 2 stopped at the uppermost portion and the powdered raw material adhering to the lump are removed by removing the litter bar 4 and rotating the lump bar driving cylinder 6 downward to remove lump. Discharge to chute 8. Here, the installation position in the width direction of the wiping bar 4 is
The lump bar 4 is passed between the lump collecting bars 2 to reliably remove the clogged lump 3 and the attached powdery raw material.

The pitch of the lump collecting bar 2 according to the present invention is usually set in the range of 100 to 300 mm, but should be determined in consideration of the size of the lump mixed in the powder raw material.
In addition, the slanting bar 2 should be installed at a horizontal position or higher on the belt conveyor side so that the collected lump does not escape to the next conveyor.

Since the portion of the lump bar 2 which receives the powdered raw material receives a large amount of the powdered raw material, a wear-resistant material such as ceramic should be used in consideration of wear, in particular.
In the configuration of the present invention, the lump 3 and the powder material are
It is unlikely that the powder raw material closes the gap and the powder raw material accumulates on the lump collecting bar 2. However, in case of emergency, the chute full detector 10 is installed above the lump collecting bar 2. ,
It is desirable to form a sequence so that the powder material is deposited by the detector 10.

The details of the operation flow of the mass removal bar 2 and the wiping bar 4 will be described below with reference to FIGS. FIG.
FIG. 4 is a diagram illustrating a flow of the operation of the mass removal bar 2 and the removal bar 4. FIG. 4 is a time chart of the operation flow of the mass removal bar 2 and the removal bar 4. The operation is shown in FIGS.
Are performed in the order of A, B, C, and D.

First, in A, the lump collecting bar 2 is
The take-off bar 4 rises from the lowermost position 4A in preparation for the next stage, and moves to the uppermost position 4A.
Come to B and stop. The rising time of the drop-off bar 4 is about 5 seconds in this embodiment.

Subsequently, in B, the lump collecting bar 2 is rotated upward while the lump collecting bar 2 is somewhat clogged with the lump 3 or the powder raw material is adhered. The time required for the ascending rotation is about 10 seconds in this embodiment.

In C, the wiping bar 4 is rotated downward to remove the lumps clogged in the gap of the lumping bar 2 and the powdered raw material adhering thereto, and discharge the crushed bar outside the system. The time required for this rotation is about 5 seconds in this embodiment.

In D, the lump bar 2 is rotated downward while the lump collecting bar 2 is cleanly cleaned, and returns to the steady lowermost position. The time required for the downward rotation is about 10 seconds in this embodiment. Hereinafter, similarly, A, B, C, D
Is repeated, but the time during which the normal lump collecting bar 2 from D to A receives the powder raw material is about 5 to 10 minutes.

According to the present invention, the time during which the normal mass collecting bar 2 from D to A receives the powder material is determined by the mixing ratio of the mass 3 of the powder material to be transported, the mass of the powder material into the mass collecting bar 2. Should be appropriately determined according to the degree of adhesion of the particles, and it is desirable that the adjustment can be performed by a timer in practice.

[0020]

As described above, according to the present invention, the adhesion of the powder material to the lump bar and the blockage of the lump bar due to the blockage of the lump are eliminated, and the lump in the raw material is removed stably and reliably. You. As a result, the problem that the lump is caught by the chute at the transfer part of the belt conveyor and cuts the belt or cuts the powder material from the hopper of the transport destination, which is clogged in the cutout gate part, and the problem of unstable cutting is solved it can.

[Brief description of the drawings]

FIG. 1 is a side view showing a lump removing device according to the present invention.

FIG. 2 is a cross-sectional view illustrating the lump removing device of the present invention.

FIG. 3 is a side view illustrating the operation of a lump removing bar and a wiping bar of the lump removing device according to the embodiment of the present invention.

FIG. 4 is a time chart illustrating a temporal operation of a lump removing bar and a wiping bar of the lump removing device according to the embodiment of the present invention.

FIG. 5 is a diagram showing the relationship between the number of times of lump collection at the charging hopper gate and the sintering yield before and after the lump removing apparatus according to the embodiment of the present invention is installed in the raw material transporting step in the sintering machine. .

FIG. 6 is a side view illustrating a lump removing apparatus according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Mass removal bar 3 Mass 4 Discharge bar

──────────────────────────────────────────────────の Continuing from the front page (72) Takashi Takahashi 1 Kimitsu, Kimitsu City, Chiba Pref. Inside Nippon Steel Corporation Kimitsu Works (56) References Fully Opened Showa 50-37282 (JP, U) Fully Opened Sho-56-80322 (JP, U) Full-scale Sho-64-25383 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65G 69/00-69/28 B65G 47/84

Claims (1)

(57) [Claims] 1. A comb-toothed bar having one end fixed to a rotatable shaft and the other end opened at a transfer portion of a belt conveyor for transporting powdery and granular materials such as iron ore and limestone. A second shaft is rotatably installed near and parallel to the axis of the raw material. The second axis is provided between the teeth of the mass removal bar. A lump removing apparatus for a powdery or granular raw material, wherein a large number of passing-off bars are fixed.